370z Supercharger Boost Issues

pkxu123

Update on post

I took it to another shop for diagnostic

Immediately, within a couple of hours they found the cause of the rattle AND the issue thats causing boost restriction! Amazing!

Soon as they took the bumper off, they can already tell that the intake was the problem. They did a dyno run with the intake on and off. With it on, they only saw around 5psi of boost. After they took it off, they immediately saw 10.

The shop that worked on the car initially custom fabricated the intake so I gave them a call and they were surprised that it was causing that much of a restriction.

And now the rattle…. They chucked it on the hoist and found that the right cat is defective… something is internally loose. Been advised to do a warranty claim.

Will keep this thread updated soon as I get updates…

NissanTracker

I can tell you that I've blown OEM cats and high flow cats on my supercharger set ups on a couple of occasions. Especially if running rich. My current fix is running resonated ART pipes and moving the Cat cells further down the stream. (Suggested by Seb @specialtyZ).

I haven't installed them yet, but I'm hoping to lower temps as well that is causing timing to get pulled when IAT's climb in WOT. Should have some logs in a couple weeks + retune for it. I'll post results

370zMelb

So are you going to bring it to a new shop or have the old shop fix the intake and get them to retune it again?

If I were you, I would just demand a refund and take it elsewhere. Seems like you've had nothing but trouble and dishonesty through this shop.

pkxu123

I called the shop but the owner wasn’t in the shop. The front desk has told me he will let the owner know and I will receive a phone call from him. Been 2 days and I haven’t received anything yet…

At this point, I’m probably leaning towards a refund so I can get someone else to sort it out if they’re not willing to.